A student carries out an experiment to find the density of a rock. Which two measurements does the student need to make to determine the density of the rock?

• A

• B

• C

• D

A tennis ball is dropped from position 1. It falls vertically onto a hard surface at position 2. Which energy changes have taken place between position 1 and position 2?

• gravitational potential → kinetic → chemical

• gravitational potential → kinetic → elastic (strain)

• kinetic → gravitational potential → chemical

• kinetic → gravitational potential → elastic (strain)

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A boy holds onto a bar and pulls himself up until his chin is level with the bar. He raises himself through 40 cm in 0.5 s. The weight of the boy is 500 N. What is the average power he produces as he raises himself?

• 40 W

• 400 W

• 4000 W

• 40 000 W

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-5

A block of lead of mass 500 g is at its melting point. The specific latent heat of fusion of lead = 23 kJ / kg. How much energy is required to completely melt the block?

• 46 J

• 12 000J

• 46 000J

• 12 000 000J

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The diagram shows the apparatus needed for an experiment to determine the specific heat capacity of the material from which an object is made. Which piece of apparatus could be omitted if the purpose of the experiment is to determine the thermal capacity of the object?

• ammeter

• thermometer

• stop-clock

• balance

Both boiling and evaporation involve a change of state from liquid to gas. Which row gives the correct difference between boiling and evaporation?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Two isolated metal spheres are both negatively charged. The spheres are brought close together but do not touch. Which diagram shows the charge distribution on the spheres?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The diagram shows a piece of metal resistance wire. Which wire, made of the same metal, has a smaller resistance?

• a wire of the same length with a larger diameter

• a wire of the same length with a smaller diameter

• a wire of greater length with the same diameter

• a wire of greater length with a smaller diameter

Two magnets are placed near a current-carrying coil. The diagram shows this experimental arrangement and the current direction in the coil. Which statement is correct?

• X is repelled by the coil and Y is attracted.

• X is attracted to the coil and Y is repelled.

• Both X and Y are repelled by the coil.

• Both X and Y are attracted to the coil.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Four cubic copper containers are filled with water. The surfaces of all the containers are painted black. Two of the containers have sides of length 20cm and the other two containers have sides of length 40cm. Two of the containers contain water at 80 °C and the other two contain water at 30 °C. Which container radiates energy at the lowest rate?

• A

• B

• C

• D

Tags

NGSS.HS-PS3-4